Clothing for a machine for producing fiber-cement components and production method for a clothing of this type

Patent metadata

Field	Value
Publication number	US-11085149-B2
Application number	US-201917254406-A
Country	US
Kind code	B2
Filing date	May 21, 2019
Priority date	Jun 21, 2018
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A clothing for a machine for producing fiber cement components includes a basic fabric having MD yarns and CD yarns. At least some of the MD yarns are formed from first multifilaments of a first material and second multifilaments twisted therewith of a second material. The first material has a higher tensile strength and a higher melting temperature than the second material. The MD yarns are heat-treated at a temperature between the melting temperature of the second material and the melting temperature of the first material, so that the at least partially melted second material forms a matrix after cooling, in which the first multifilaments of the first material are embedded. A method for producing the clothing is also provided.

First claim

The invention claimed is:

1. A clothing for a machine for producing fiber cement components, the clothing comprising:
a base fabric including MD yarns and CD yarns, at least some of said MD yarns being formed from first multifilaments composed of a first material and second multifilaments composed of a second material, said first and second multifilaments being twisted together, said first material having a higher tensile strength and a higher melting temperature than said second material;
said second material being at least partially melted, by heat-treatment of said MD yarns at a temperature between a melting temperature of said second material and a melting temperature of said first material and cooling, to form a matrix, and said first multifilaments formed of said first material being embedded in said matrix; and
a further fabric disposed on a side of said base fabric facing the fiber cement components to be produced, said further fabric including at least one of:
CD yarns having a smaller diameter than said CD yarns of said base fabric, or
MD yarns having a smaller diameter than said MD yarns of said base fabric.

2. The clothing according to claim 1 , wherein said first
multifilaments and said second multifilaments of said MD yarns are pre-twisted with one another in a first direction of rotation as a first stage, and a plurality of said pre-twisted yarns are twisted with one another in a second direction of rotation opposite to said first direction of rotation as a second stage.

3. The clothing according to claim 2 , wherein at least one of said first stage having not more than 236.22 revolutions per meter or said second stage having not more than 118.11 revolutions per meter.

4. The clothing according to claim 2 , wherein at least one of said first stage having not more than 196.85 revolutions per meter or said second stage having not more than 98.43 revolutions per meter.

5. The clothing according to claim 2 , wherein at least one of said first stage having not more than 157.48 revolutions per meter or said second stage having not more than 78.74 revolutions per meter.

6. The clothing according to claim 1 , wherein at least one of said first multifilaments or said second multifilaments have threads with a fineness of not more than 2400 tex.

7. The clothing according to claim 1 , wherein at least one of said first multifilaments or said second multifilaments have threads with a fineness of not more than 2300 tex.

8. The clothing according to claim 1 , wherein at least one of said first multifilaments or said second multifilaments have threads with a fineness of not more than 2200 tex.

9. The clothing according to claim 1 , wherein said first material is polyamide and said second material is polypropylene.

10. The clothing according to claim 1 , wherein said MD yarns formed from said first and second multifilaments have a proportion of 10% by weight to 30% by weight of said first material.

11. The clothing according to claim 1 , wherein said MD yarns formed from said first and second multifilaments have a proportion of 15% by weight to 25% by weight of said first material.

12. The clothing according to claim 1 , wherein said CD yarns are monofilaments interwoven with said MD yarns in said base fabric.

13. The clothing according to claim 1 , wherein said base fabric is a double-ply fabric including two systems of said MD yarns and one system of said CD yarns.

14. A clothing for a machine for producing fiber cement components, the clothing comprising:
a base fabric including MD yarns and CD yarns, at least some of said MD yarns being formed from first multifilaments composed of a first material and second multifilaments composed of a second material, said first and second multifilaments being twisted together, said first material having a higher tensile strength and a higher melting temperature than said second material;
said second material being at least partially melted, by heat-treatment of said MD yarns at a temperature between a melting temperature of said second material and a melting temperature of said first material and cooling, to form a matrix, and said first multifilaments formed of said first material being embedded in said matrix;
two outer sides of the clothing; and
a layer of staple fibers disposed on one or both of said outer sides of the clothing.

15. A method for producing a clothing, including a base fabric having MD yarns and CD yarns, to be used in a machine for producing fiber cement components, the method comprising:
pre-twisting first multifilaments composed of a first material and second multifilaments composed of a second material to form at least some of the MD yarns, the first material having a higher tensile strength and a higher melting temperature than the second material;
heat-treating the MD yarns at a temperature between a melting temperature of the second material and a melting temperature of the first material to form a matrix from the at least partially melted second material and to embed the first multifilaments composed of the first material in the matrix after cooling; and
applying a further fabric on a side of the base fabric facing the fiber cement components to be produced, the further fabric including at least one of:
CD yarns having a smaller diameter than the CD yarns of the base fabric, or
MD yarns having a smaller diameter than the MD yarns of the base fabric.

16. The method according to claim 15 , which further comprises, prior to the heat treatment, interweaving the MD yarns with the CD yarns to create the base fabric.

17. The method according to claim 15 , which further comprises carrying out the twisting by:
pre-twisting the first multifilaments with the second multifilaments in a first direction of rotation; and
finally twisting a plurality of the pre-twisted yarns in a second direction of rotation opposite to the first direction of rotation.

18. A method for producing a clothing, including two outer sides and a base fabric having MD yarns and CD yarns, to be used in a machine for producing fiber cement components, the method comprising:
pre-twisting first multifilaments composed of a first material and second multifilaments composed of a second material to form at least some of the MD yarns, the first material having a higher tensile strength and a higher melting temperature than the second material;
heat-treating the MD yarns at a temperature between a melting temperature of the second material and a melting temperature of the first material to form a matrix from the at least partially melted second material and to embed the first multifilaments composed of the first material in the matrix after cooling; and
applying a layer of staple fibers on one or both of the outer sides of the clothing.

Assignees

• Voith Patent Gmbh

Inventors

• Koeckritz Uwe
• Crook Bob

Classifications

• D03D15/47

  multicomponent, e.g. blended yarns or threads (multicomponent fibres or filaments D03D15/292) · CPC title

• D03D15/41

  with specific twist · CPC title

• D03D15/573

  Tensile strength · CPC title

• D03D15/283

  synthetic polymer-based, e.g. polyamide or polyester fibres (cellulose-based artificial fibres D03D15/225) · CPC title

• D21F1/0036 Primary

  Multi-layer screen-cloths · CPC title